Do in 5 mins please

100 skilled workmen, 40 semi-skilled workmen and 60 unskilled workmen were to work for 30 weeks to get a contract job completed. The standard weekly wages were 360, 36 and 24 respectively. The job was actually completed in 32 weeks by 80 skilled, 50 semi-skilled and 70 unskilled workmen who were paid 365, 40 and 20 respectively as weekly wages. Find out the labour cost variance, labour rate variance, labour mix variance and labour efficiency variance